I'm thinking that helmet-heroes needs some more OP skills.
Warrior: Javelin. The character throws his or her weapon at enemy or in PvP, a player. After throwing, he or she instantly retrieves weapon. (Not so people can loot your sword)
Mage: Shield. The magician creates a barrier around him or her. The shield HP depends on player skill and magic.
Archer: Seeking arrows. Arrows find the nearest mob or player and attacks it.
Cowboy: Atomic bomb. The cowboy drops a bomb (Where he or she is) with huge damage span, (About 1/5th of the area size)
Tell me if you think this is a good idea!
(All of these will take an ungodly amount of MP.)